Slitter



Sept. 27, 1966 G. B. DU 8018 3,275,254

SLITTER Filed March 16, 1964 2 Sheets-Sheet 1 nul [I INVENTOR.

GARY B. DuBOlS ATTORNEYS United States Patent 3,275,254 SLITTER Gary B. Du Bois, Fulton, N.Y., assignor to The Black Clawson Company, Hamilton, Ohio, a corporation of ()hio Filed Mar. 16, 1964, Ser. No. 351,959 3 Claims. (Cl. 242-562) This invention pertains to slitters and more particularly to web slitters for paper winders.

It is a common practice to incorporate web slitting apparatus in a paper winding machine in order to divide the web into rolls of smaller width during winding. Such a slitter often forms a part of a drum-type winder of the general type shown in United States Patent of Dain et al. No. 2,950,875, of Aug. 30, 1960, and assigned to the same assignee as this invention.

In such winding machines, the slitter apparatus has normally been incorporated in a position somewhat beneath the driving drums. As a result, the slitter knives are in an awkward and difficult position to make necessary adjustments thereon when setting up the machine for different slitting widths. In such machines, the adjustment of slitting widths often requires partial dismantling of the machine and, in some instances, requires the operator to reach underneath many components of the machine in order to make the desired adjustments.

One of the primary objects of the present invention is the provision in a drum type winding machine of a slitter assembly which may be moved from an inner slitting position to an outer position in which the slitting components are readily accessible for adjustment.

Another important object of this invention is the provision of a slitter in which front and rear cooperating slitting components move together as a unit between an inner slitting position and an outer position for free access thereto.

A still further object is the provision in a drum type slitter winding machine of a swing out slitter in which the slitting components are carried on pivotally mounted arms received within the side frame members of the machine and which arms and components are movable together between an inner operative or slitting position and an outer position clear of the machine for adjustment.

These and other objects and advantages of the invention will be apparent from the following description, the accompanying drawings and the appended claims.

In the drawings:

FIG. 1 is a perspective view of a slitter winding machine constructed according to this invention, showing the slitter assembly in the inner or operative slitting position;

FIG. 2 is a partially broken away front elevational view of the slitter assembly of the winder of FIG. 1; and

FIG. 3 is a vertical section through the slitter assembly taken generally along the line 3-3 of FIG. 2, with the parts being shown in full line in the slitting position and in broken line in the moved or outer position for adjustment.

Referring to the figures of the drawing which illustrate a preferred embodiment of the invention, a slitter winding machine constructed according to the present invention is shown generally at in FIG. 1 as including a pair of generally vertical, spaced-apart side frame members 11 and 12. The frame member 11 may, for example, be on the aisle side of the machine while the opposite 3 ,275,254 Patented Sept. 27, 1966 ice frame member 12 may be on the drive side of the machine, with the drive components thereof not shown. As is well known in this art, and as shown in the above-identified patent, the drum type slitter winder 10 includes a pair of drive drums 15 and 16 which engage the surface of the roll to be wound from the web 17 (FIG. 3). The core or mandrel is, in turn, supported in blocks 18 and 1? which are guided in generally vertically aligned ways 21 and 22 on the front surfaces of the side frame members 11 and 12.

Also received for sliding movement in the vertical ways is a rider roll 24. The rider roll 24 may be pneumatically loaded to the upper surface of the roll being wound, as shown in the Dain patent.

This invention provides a swing out slitter assembly for the winding machine 10 of this assembly is indicated generally at in FIG. 1 supported generally between a subframe portion 31 of the principal frame members 11 and 12. Reference may be had to FIGS 2 and 3 for an understanding of the details of this arrangement. In general, the slitter assembly 30 is supported between a pair of primary slitter support arms 32 and 33. These arms are somewhat trapezoidal in outline form, as shown in FIG. 3. Each arm 32 and 33 has a lower end 35 supported for rotational movement on the adjacent upright frame member 11 and 12, on a short shaft or stub shaft 36 and key 38. As shown in the broken away right hand portion of FIG. 2, the stub shaft 36 on the aisle side extends inwardly of the slitter and supports on its inner end the primary slitter support arm 32 for movement therewith. A similar arrangement of the stub shaft 36 is provided for the arm 33 at the other side of the machine to support that arm for rotational movement on the adjacent vertical side frame member 12.

Means connecting the primary slitter support arms 32 and 33 for unison movement include a torque tube 40 which extends between the arms 32 and 33, and in generally axially alignment with the stub shafts 36. The torque tube 40 is rigidly connected to each of the arms 32 and 33 respectively by flanges 42 and 43 formed on the ends thereof and tie bolts 44 which extend through the flanges and into the adjacent arm 32 or 33.

The slitter means are also supported between the support arms 32 and 33. This includes a rear slitter shaft which extends between the arms 32 and 33. The shaft 50 is rotatably and removably supported on the arms on bearings 52, one of such bearings being shown in broken outline form in FIG. 3, as having a removable cap 53. A suitable slitter drive gear may be mounted on the shaft 50 on the drive side of the machine between the arm 33 and the adjacent vertical support frame member 12 for driving the rear slitter shaft 50.

A plurality of cylindrically shaped rear slitter elements 58, one of the slitter elements for each of the slitter knives, may be mounted on the rear slitter shaft 50. There are as many rear slitter elements 58 as there are slits to be made in the web. Means supporting the slitter knives includes a front slitter support tube 69 which is also pivotally or rotationally supported between the primary slitter support arms 32 and 33. The support tube 60 is provided with a dovetail bar 62, as shown in section in FIG. 3, on which a plurality of slitter knives may be adjustably mounted. The knives 65 include the usual knife wheel 66 which runs in shearing engagement with one side edge of one of the slitter elements 58, in the manner well known in the art.

Means providing for the rotational movement of the front slitter tube 60 through a limited angle for bringing the slitter knives 66 into and out of engagement with their respective slitter elements 58 includes a first pair of air cylinders 70. Each air cylinder 70 has one end fixed by a suitable pin 72 to the adjacent arm 32 or 33, and has its piston rod element drivably connected to one end of the slitter support tube 60 thereof through a short arm element 73 on the slitter support tube. Through the air cylinders 70, the slitter knives 66 may be moved outwardly through a limited angular extent out of engagement with the web 17 and inWardly into shearing or slitting engagement with the web and in cooperating running engagement with one of the slitter elements 58.

The slitter assembly 39 is further provided with a pair of web guides between the slitter elements, there being an upper web guide 75 which is carried on a transverse support 76 extending between the arms 32 and 33. Also, a lower web guide 78 is supported on another transverse support 79 which also extends between the primary support arms. The web guide support members 76 and 79 add to the transverse rigidity of the components of the slitter assembly 30 with respect to the primary support arms 32 and 33.

Means for moving the slitter assembly 30 as a unit between an inner slitting position and an outer slitter adjusting position, as shown in the broken lines of FIG. 3 for adjustment of the slitter elements 58 and the slitter knife assemblies 65, includes a pair of slitter pivot arms 82 and 83 respectively for the primary slitter support arms 32 and 33. The arms 82 and 83 are, respectively, received within the forward portion 31 of the frame members 11 and 12 and are each keyed at 85 in driving relation to the inner end of one of the stub shafts 36. Also, a pair of slitter assembly pivot motors 90 are provided, one for each arm 82 and 83. Each of the motors 90 is pivotally mounted on a transverse trunnion pin 92 on the side frame members of the slitter, as shown in FIG. 3. Each motor 90 has its piston rod connected to drive the associated arm at a suitable fork connection 95.

Means for defining the rearwardmost or inner slitting position of the slitter assemblies 30, may conveniently include an adjustable bumper stop rod 100 which is threadedly received within a suitable bushing 102 received in the adjacent side frame member. The bumper pin 190 has an end 163 which engages a suitable stop plate 104 on each of the arms. This position may be electrically sensed by a suitable limit switch 105 which has an arm 106 engaged by a tab 107 in the inner or slitting position.

In the operation of the slitter winder, as described above, when it is desired to change the set up of the slitters, the motors 90 are operated to swing the slitter assembly 30 on the arms 32 and 33 outwardly to the broken line position as shown in FIG. 3. This pivotal movement takes place on the stub shaft 36 which turn with the arms 32 and 33 in suitable sleeve bushings in the side frame members. In this position, both the outer slitter assemblies 65, and the slitter elements 58 on the rear slitter shaft 50, are swung outwardly clear of the frame members and may be readily adjusted to the desired position. In addition, since all of the slitting elements have moved out in unison with the arms 32 and 33, it is now possible to make the required fine adjustments of the slitter knives 66 with respect to the cylindrical slitter elements 58, to provide the desired amount of overlap and running contact. It will thus be seen that these necessary adjustments may be performed efficiently and quickly. If it is necessary to reduce or increase the number of slits, the rear slitter shaft is readily accessible for removal by a suitable hoist after removing the upper half or cap 53 of the bearings 52, and additional slitter elements 5.8 inserted or the excess number removed, without the necessity of disassembly of the machine.

When it is then desired to thread the machine and commence a winding operation, the slitter assembly is moved from its outer position to the inner slitting position as shown in full lines, in FIG. 3, by the retraction of the motors 90. In this position the guides and 78 are in alignment with a web 17 threaded over the bottom of an idler roll 11%, and guide the Web for slitting at the elements 58. The front slitter tube 60 may be suitably rotated by its air motors 70 to retract the knives 66, and the web then suitably threaded over the face of the lower and upper Web guides 78 and 75. At that time or at any time desired, the knives 66 may be then returned to their pre-aligned slitting positions.

It is therefore seen that this invention provides an improved slitter web winding machine in which the entire assembly of slitters are adapted to be swung outwardly into a position for convenience of adjustment and returned inwardly to a predetermined position for slitting. Down time is thus reduced in the setting up of the machine and the machine may therefore be utilized to a greater extent than heretofore possible.

While the form of apparatus herein described constitutes a preferred embodiment of the invention, it is to be understood that the invention is not limited to this precise form of apparatus, and that changes may be made therein without departing from the scope of the invention which is defined in the appended claims.

What is claimed is:

1. In a combined winder and slitter having spaced apart side frame members supporting a pair of drive drums for the peripheral driving of a paper roll wound thereon and a rider roll mounted for general vertical movement on said side members as said wound roll builds up the improvement comprising, a slitter assembly mounted between said side frame members including a pair of spaced apart arms, means pivotally mounting one each of said arms on each of said side members adjacent an inside surface thereof, a rear slitter shaft extending transversely between said arms and rotatably mounted thereon in spaced relation to said pivotal mounting means, rear slitter elements supported on said shaft, a front slitter support tube rotatably mounted on said arms in spaced relation to said pivotal mounting means and to said rear slitter shaft and extending between said arms, a plurality of slitting knives mounted on said front support tube for cooperating engagement with the rear slitter elements, first piston motor means supported on said arms and connected to rotate said front slitter support tube selectively to bring said slitter knives into and out of said cooperating engagement with said rear slitter elements, and second piston motor means connected between said side frame members and said arms for pivoting said arms on said side frame members carrying said slitter assembly between an outer position forward of said drive drums exposing said slitter knives and elements for adjustment and an inner position beneath said drive drums for slitting a web of paper being wound on said drums.

2. An improved slitter winder comprising a pair of spaced apart side frames, means supported on said side frames for winding a roll of paper from a web, a pair of slitter support arms one each pivotally mounted on each of said side frame members, a slitter assembly mounted on said arms and including a rear slitter shaft extending between said arms in Spaced relation to the pivotal point of said arms on said frame members, a front slitter support tube extending between said arms in spaced relation to said rear slitter shaft and to said arm pivot points and mounted for limited pivotal movement thereon, cooperating slitter knife elements supported on said shaft and tube for slitting a web running therebetween, first motor means carried on said arms and con nected to rotate said slitter support tube to bring the associated slitter knife elements thereon into and out of engagement with its cooperating slitter element on said rear slitter shaft and second motor means having a connection to said frame members and connected to move said arms in unison and the slitter assembly supported thereon between an inner slitting position and an outer position for the adjustment of the slitter knife elements.

3. The Winder of claim 2 further comprising bearings having removable caps supporting said rear slitter shaft 10 for rotation on said arms providing ease of removing said slitter shaft for adjusting the position of the slitter 6 elements thereon when said assembly is in said outer position.

References Cited by the Examiner UNITED STATES PATENTS 3,064,915 11/1962 Hornstein et a1. 242-66 3,072,353 1/1963 Moser 242-564 FOREIGN PATENTS 663,652 8/1938 Germany.

MERVIN STEIN, Primary Examiner.

W. S. BURDEN, Assistant Examiner. 

1. IN A COMBINED WINDER AND SLITTER HAVING SPACED APART SIDE FRAME MEMBER SUPPORTING A PAIR OF DRIVE DRUMS FOR THE PERIPHERAL DRIVING OF A PAPER ROLL WOUND THEREON AND A RIDER ROLL MOUNTED FOR GENERAL VERTICAL MOVEMENT ON SAID SIDE MEMBERS AS SAID WOUND ROLL BUILDS UP THE IMPROVEMENT COMPRISING, A SLITTER ASSEMBLY MOUNTED BETWEEN SAID SIDE FRAME MEMBERS INCLUDING A PAIR OF SPACED APART ARMS, MEANS PIVOTALLY MOUNTING ONE EACH OF SAID ARMS ON EACH OF SAID SIDE MEMBERS ADJACENT AN INSIDE SURFACE THEREOF, A REAR SLITTER SHAFT EXTENDING TRANSVERSELY BETWEEN SAID ARMS AND ROATABLY MOUNTED THEREON IN SPACED RELATION TO SAID PIVOTAL MOUNTING MEANS, REAR SLITTER ELEMENTS SUPPORTED ON SAID SHAFT, A FRONT SLITTER SUPPORT TUBE ROTATABLY MOUNTED ON SAID ARMS IN SPACED RELATION TO SAID PIVOTAL MOUNTING MEANS AND TO SAID REAR SLITTER SHAFT AND EXTENDING BETWEEN SAID ARMS, A PLURALITY OF SLITTING KNIVES MOUNTED ON SAID FRONT SUPPORT TUBE FOR COOPERATING ENGAGEMENT WITH THE REAR SLITTER ELEMENTS, FIRST PISTON MOTOR MEANS SUPPORTED ON SAID ARMS AND CONNECTED TO ROTATE SAID FRONT SLITTER SUPPORT TUBE SELECTIVELY TO BRIONG SAID SLITTER KNIVES INTO AND OUT OF SAID COOPERATING ENGAGEMENT WITH SAID REAR SLITTER ELEMENTS, AND SECOND PISTON MOTOR MEANS CONNECTED BETWEEN SAID SIDE FRAME MEMBERS AND SAID ARMS FOR PIVOTING SAID ARMS ON SAID SIDE FRAME MEMBERS CARRYING SAID SLITTER ASSEMBLY BETWEEN AN OUTER POSITION FORWARD OF SAID DRIVE DRUMS EXPOSING SAID SLITTER KNIVES AND ELEMENTS FOR ADJUSTMENT AND AN INNER POSITION BENEATH SAID DRIVE DRUMS FOR SLITTING A WEB OF PAPER BEING WOUND ON SAID DRUMS. 